#figure one

Mandy El-Sayegh Figure One

One of the most popular types of communications circuits used for Wide Area Networking applications is the T-1 circuit. T-1 is a high-speed digital line which runs at a rate of 1.544 Mb/s, divided into 24 channels of 64 kb/s each. These lines provide a very high level of speed and flexibility, and can be used in many applications, including data and voice.

This white paper will discuss the basics…

IBM’s Midrange systems (AS/400, Advanced System 36, System 34, System 36, System 38) are popular workhorses in business applications worldwide, with over 250,000 units sold. These systems were designed to use a host-terminal connectivity scheme, with almost all processing being done in the host system, and terminals which merely display data generated by the host. They were designed to provide…

Fiber optic cables, like any other cable type, require testing to ensure that they meet the applicable performance level for the application they will be used in. These tests are generally easy to perform, however some tests do require specialized test equipment.

Types Of Tests

There are three basic tests which are commonly employed to testfiber optic cable. These tests range from very basic to…

Ethernet was originally designed to operate over a heavy coaxial cable, and was later updated to also support a thinner, lighter, coaxial cable type. Both systems provided a network with excellent performance, but they utilized a bus topology which made changing a network a difficult proposition, and also left much to be desired in regard to reliability. Also, many buildings were already wired…

Thick Ethernet, officially known as 10 Base 5, is the oldest form of Ethernet. It was originally developed in the late 1970’s by Digital Equipment Corporation, IBM, and Xerox, and became an international standard (IEEE 802.3) in 1983.

Topology & Cabling

10 Base 5 is laid out in a bus topology, with a single coaxial cable connecting all nodes together. At each end of the coaxial cable is a…